Patents Assigned to Centro de Investigacion en Quimica Aplicada
-
Method for producing porous particles by means of a hybrid process of atomisation via drying-cooling
Patent number: 11746207Abstract: The invention relates to a method for producing particles with pore structures, by means of a hybrid process of atomization via drying-cooling, from a water-in-oil-type emulsion of a composition of a non-solubilized and in melt state matrix. The production method comprises: i) forming a water-in-oil-type emulsion consisting of a composition of a solvent that is aqueous or soluble in water (dispersed phase) and a composition of a non-solubilized and in melt state matrix (continuous phase); ii) forming discrete particles from the emulsion via atomization, using a flow of gas at high pressure and temperature; iii) immediately removing the solvent via evaporation; and iv) subsequently cooling the formed discrete particles, resulting in porous particles that are substantially free from solvents.Type: GrantFiled: June 14, 2018Date of Patent: September 5, 2023Assignees: CENTRO DE INVESTIGACION EN QUIMICA APLICADA, INSTITUTO DE ECOLOGIA, A.C.Inventors: Carlos Jose Espinoza Gonzalez, Noe Benjamin Navarro Guajardo, Edgar Miguel Garcia Carrillo, Oliverio Santiago Rodriguez Fernandez, Salvador Fernandez Tavizon, Claudia Anahi Perez Torres -
Patent number: 11639319Abstract: The present invention relates to fertilizer particles encapsulated in modified chitosan and a method of obtaining them. The particles described in this invention allow a controlled, moderate, or gradual release of an active material from a reserve substrate to another medium, in order to increase the effectiveness of the active material by prolonging its action over time. This invention is characterized in that the active components of said formulations are capable of causing a synergistic effect, considerably increasing the growth and development of plants.Type: GrantFiled: August 27, 2020Date of Patent: May 2, 2023Assignees: INSTITUTO DE ECOLOGIA, A.C., CENTRO DE INVESTIGACIÓN EN QUIMICA APLICADAInventors: Claudia Anahi Perez Torres, Nicolaza Pariona Mendoza, Carlos Jose Espinoza Gonzalez, Jorge Romero Garcia, Layza Alejandrina Arizmendi Galaviz, Enrique Ibarra Laclette, Eva Garcia Ilizaliturri
-
Publication number: 20220064077Abstract: The present invention relates to fertilizer particles encapsulated in modified chitosan and a method of obtaining them. The particles described in this invention allow a controlled, moderate, or gradual release of an active material from a reserve substrate to another medium, in order to increase the effectiveness of the active material by prolonging its action over time. This invention is characterized in that the active components of said formulations are capable of causing a synergistic effect, considerably increasing the growth and development of plants.Type: ApplicationFiled: August 27, 2020Publication date: March 3, 2022Applicants: INSTITUTO DE ECOLOGIA, A.C., CENTRO DE INVESTIGACIÓN EN QUIMICA APLICADAInventors: Claudia Anahi PEREZ TORRES, Nicolaza PARIONA MENDOZA, Carlos Jose ESPINOZA GONZALEZ, Jorge ROMERO GARCIA, Layza Alejandrina ARIZMENDI GALAVIZ, Enrique IBARRA LACLETTE, Eva GARCIA ILIZALITURRI
-
Patent number: 9533260Abstract: A method for obtaining sweet gas, synthetic gas, and sulphur from natural gas. The method includes the steps of removing impurities from the natural gas for obtaining pre-treated natural gas; sweetening the pre-treated natural gas through a separation using a plurality of membranes for obtaining sweet gas and acid gases; ionizing the acid gases to dissociate them into sulphur and synthetic gas with remnants of acid gases; and neutralizing the synthetic gas with remnants of acid gases for generating sweet gas. Likewise, a system is presented on how to implement the method.Type: GrantFiled: July 3, 2013Date of Patent: January 3, 2017Assignees: CENTRO DE INVESTIGACION EN QUIMICA APLICADA, CENTRO DE INVESTIGACION CIENTIFICA DE YUCATAN, A. C., INSTITUTO NACIONAL DE INVESTIGACIONES NUCLEARESInventors: Yibran Argenis Perera Mercado, Luis Alfonso Garcia Cerda, Griselda Castruita De Leon, Luis Alberto Villarreal Cardenas, Maria Guadalupe Neira Velazquez, Manuel de Jesus Aguilar Vega, Maria Isabel de los Dolores Loria Bastarrachea, Jose Luis Santiago Garcia, Alejandra Aimee Gutierrez Mejia, Joel Osvaldo Pacheco Sotelo, Marquidia Josseline Pacheco Pacheco, Ricardo Valdivia Barrientos, Jose Fidel Ramos Flores, Miguel Angel Duran Garcia, Miguel Angel Hidalgo Perez
-
Publication number: 20140056981Abstract: A method for producing drug-loaded polymeric nanoparticles, which includes the steps of: (a) preparing a first solution by dissolving a drug in a polymerizable monomer; (b) preparing a micellar solution by dissolving a surfactant and a water-soluble radical initiator in water; (c) adding said first solution to said micellar solution for polymerizing said polymerizable monomer, obtaining a dispersion of drug-loaded polymeric nanoparticles, the drug-loaded polymeric nanoparticles have a controlled size with average diameter smaller than 50 nm; and (d) evaporating residual polymerizable monomer from the dispersion of drug-loaded polymeric nanoparticles.Type: ApplicationFiled: August 21, 2013Publication date: February 27, 2014Applicant: CENTRO DE INVESTIGACION EN QUIMICA APLICADAInventors: Raul Guillermo LOPEZ-CAMPOS, Hened SAADE CABALLERO
-
Publication number: 20130149381Abstract: A method for preparing polymeric nanoparticles having entrapped active ingredients or drugs, the method includes the step of preparing a reaction by mixturing water, a surfactant, and a water-soluble radical initiator; polymerizing a polymerizable monomer in the reaction to obtain a dispersion of polymeric nanoparticles having a controlled size with average diameters smaller than 50 nm; dissolving one or more active ingredients in a suitable solvent; adding the solution of active ingredients to the dispersion of polymeric nanoparticles and allowing that the active ingredients to become entrapped within polymeric nanoparticles; and evaporating the dispersion of polymeric nanoparticles having entrapped active ingredients to evaporate the residual monomer and the solvent used as a vehicle for loading the active ingredient.Type: ApplicationFiled: December 7, 2012Publication date: June 13, 2013Applicant: CENTRO DE INVESTIGACION EN QUIMICA APLICADAInventor: Centro De Investigacion En Quimica Aplicada
-
Patent number: 8039558Abstract: It is depicted a polymer composition with elastomeric properties at wide temperature ranges of the type comprising polymers and/copolymers resulting from substituted or unsubstituted vinyl aromatic monomers and from dienic monomers, which is homogeneous and compatible in nature, with such composition being based on stereoregular polymers and without requiring the additional use of compatibilizing agents. Likewise, it is depicted the process to obtain the same, as well as to hydrogenise them, without requiring the use of additional catalyzers or processes.Type: GrantFiled: July 28, 2010Date of Patent: October 18, 2011Assignees: Dyansol Elastomeros, S.A. de C.V., Centro de Investigacion en Quimica Aplicada (CIQA)Inventors: Sergei Kniajanski, Maricela Garcia-Zamora, Sergio Corona-Galvan, Rodolfo Flores-Flores, Marcela Garcia-Ramirez, Gregorio Cadena-Pliego
-
Publication number: 20100311907Abstract: It is depicted a polymer composition with elastomeric properties at wide temperature ranges of the type comprising polymers and/copolymers resulting from substituted or unsubstituted vinyl aromatic monomers and from dienic monomers, which is homogeneous and compatible in nature, with such composition being based on stereoregular polymers and without requiring the additional use of compatibilizing agents. Likewise, it is depicted the process to obtain the same, as well as to hydrogenise them, without requiring the use of additional catalyzers or processes.Type: ApplicationFiled: July 28, 2010Publication date: December 9, 2010Applicants: DYNASOL ELASTOMEROS, S.A. DE C.V., CENTRO DE INVESTIGACION EN QUIMICA APLICADA (CIQA)Inventors: Sergei Kniajanski, Maricela Garcia-Zamora, Sergio Corona-Galvan, Rodolfo Flores-Flores, Marcela Garcia-Ramirez, Gregorio Cadenas-Pliego
-
Publication number: 20070060692Abstract: The invention relates to a polymeric composition having elastomeric properties over wide temperature ranges, of the type that comprises polymers and/of copolymers which are derived from substituted or non-substituted vinylaromatic monomers and compatible, homogeneous diene monomers. The inventive composition is based on stereoregular polymers and does not require the use of compatibilizer agents. The invention further relates to the method of obtaining said compositions and of hydrogenating same without the need for additional catalysts or methods.Type: ApplicationFiled: August 15, 2003Publication date: March 15, 2007Applicants: DYNASOL ELASTOMEROS, S.A. DE C.V., CENTRO DE INVESTIGACION EN QUIMICA APLICADA (CIQA)Inventors: Sergei Kniajanski, Maricela Garcia-Zamora, Sergio Corona-Galvan, Rodolfo Flores-Flores, Marcela Garcia-Ramirez, Gregorio Cadenas-Pliego
-
Patent number: 6376615Abstract: The present invention describes the preparation of copolymers grafted by the so-called “grafting from” method, comprising two steps. In the first step, a polymer of a variable type referred to as poly(M1) is reacted with persistent free radicals of the type diphenyltrialkylsilyloxymethyl to form a reactive polymer poly(M1)F, containing a variable number F of these groups attached to the chain. F represents the average functionality of the reactive polymers and may be predetermined by controlling the ratio of poly(M1) and the free radical generator or TPES. In the second step, poly(M1)F is dissolved in a monomer M2 and then redissociated by heating to temperatures of 110-130° C. to produce the macroradical poly(M1) and the persistent radicals. The macroradical poly(M1) rapidly initiates polymerization whereas the diphenyltrialkylsilyloxymethyl radical stays temporarily on the sideline of the initiation reaction.Type: GrantFiled: October 16, 1998Date of Patent: April 23, 2002Assignee: Centro de Investigacion en Quimica AplicadaInventors: Ramiro Guerrero-Santos, Hortensia Maldonado Textle, Maria Esther De Leon Saenz